package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信接口服务
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";
@Autowired
private WeChatProperties weChatProperties;
@Autowired
private UserMapper userMapper;

    //微信登录
    public User wxLogin(UserLoginDTO userLoginDTO) {
        String openid=getOpenid(userLoginDTO.getCode());
        //判断openid是否为空,如果为空则表示登录失败,抛出业务异常
if(openid==null){
    throw new LoginFailedException(MessageConstant.LOGIN_FAILED);

}
        //判断当前用户是否是新用户
User user=userMapper.getByOpenid(openid);

        //如果是新用户,自动完成注册
if(user==null){
    user=User.builder()
        .openid(openid)
        .createTime(LocalDateTime.now())
        .build();
    userMapper.insert(user);
}
        //返回这个用户对象
return user;


    }
    private String getOpenid(String code){
        //调用微信接口服务,获取当前微信用户的open'id
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        String json=HttpClientUtil.doGet(WX_LOGIN,map);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
return openid;
    }
}
